Converting an ArrayAdapter to CursorAdapter for use in a SearchView

Question

How can I convert an ArrayAdapter<String> of static data into a CursorAdapter for using Suggestion Listener in SearchView? I have constructed the ArrayAdapter<String> from static data (allString)

ArrayAdapter<String> searchAdapter = new ArrayAdapter<String>(context, R.layout.listitem, allString); 

and I use it for an MultiAutoCompleteTextView which works fine in devices with API level less than 11

MultiAutoCompleteTextView findTextView.setAdapter(searchAdapter); 

However my target API is level is 11 and for API>10 I use an ActionBar within which I would like to have a SearchView instead.

Here's what I have tried: It does show the ActionBar with the embedded SearchView but does not give any suggestions as it would in the MultiAutoCompleteTextView.

@Override public boolean onCreateOptionsMenu(Menu menu) {              MenuInflater inflater = getMenuInflater();           if (android.os.Build.VERSION.SDK_INT > 10){              inflater.inflate(R.menu.menu11, menu);              searchView = (SearchView) menu.findItem(R.id.MENU_SEARCH).getActionView();              int[] to = {0};              CursorAdapter cursorAdapter = new SimpleCursorAdapter(context, R.layout.listitem, null, allBusStopString, to);              searchView.setSuggestionsAdapter(cursorAdapter);              searchView.setOnSuggestionListener(new OnSuggestionListener() {                  @Override                 public boolean onSuggestionClick(int position) {                     String selectedItem = (String)cursorAdapter.getItem(position);                     Log.v("search view", selectedItem);                     return false;                 }                  @Override                 public boolean onSuggestionSelect(int position) {                     return false;                 }              });            }else{              inflater.inflate(R.menu.menu, menu);          }      return true; } 

Answer 1

That's strange SearchView.setSuggestionsAdapter accepts CursorAdapter only.

You could create MatrixCursor and fill it with data from String array. I hope you have small data collection.

Then pass the cursor to CursorAdapter.

String[] columnNames = {"_id","text"} MatrixCursor cursor = new MatrixCursor(columnNames); String[] array = getResources().getStringArray(R.array.allStrings); //if strings are in resources String[] temp = new String[2]; int id = 0; for(String item : array){     temp[0] = Integer.toString(id++);         temp[1] = item;     cursor.addRow(temp); }                String[] from = {"text"};  int[] to = {R.id.name_entry}; busStopCursorAdapter = new SimpleCursorAdapter(context, R.layout.listentry, cursor, from, to); 

Answer 2

I was facing similar problem. You can use SearchView.setSuggestionsAdapter() which only accepts CursorAdapter. On the other hand... what's the point? If you use the standard <android.support.v7.widget.SearchView /> then it contains SearchAutoComplete which extends AppCompatAutoCompleteTextView inside. The following code worked for me:

List<String> items = Lists.newArrayList(new String[] {"aaaaa", "bbbbb", "ccccc", "ddddd"}); SearchView searchView = (SearchView) findViewById(R.id.autocomplete_searchview); SearchView.SearchAutoComplete searchSrcTextView = (SearchView.SearchAutoComplete) findViewById(android.support.v7.appcompat.R.id.search_src_text); searchSrcTextView.setThreshold(1); searchSrcTextView.setAdapter(new SuggestionAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, items)); searchSrcTextView.setOnItemClickListener(new AdapterView.OnItemClickListener() {     @Override     public void onItemClick(AdapterView<?> parent, View view, int position, long id) {         return;     } }); 

and the following Adapter code:

public class SuggestionAdapter<T> extends ArrayAdapter<T> {      private List<T> items;     private List<T> filteredItems;     private ArrayFilter mFilter;      public SuggestionAdapter(Context context, @LayoutRes int resource, @NonNull List<T> objects) {         super(context, resource, Lists.<T>newArrayList());         this.items = objects;     }      @Override     public long getItemId(int position) {         return position;     }      @Override     public T getItem(int position) {         return items.get(position);     }      @Override     public Filter getFilter() {         if (mFilter == null) {             mFilter = new ArrayFilter();         }         return mFilter;     }      public int getCount() {         //todo: change to pattern-size         return items.size();     }      private class ArrayFilter extends Filter {         @Override         protected FilterResults performFiltering(CharSequence prefix) {             FilterResults results = new FilterResults();              //custom-filtering of results             results.values = items;             results.count = items.size();              return results;         }          @Override         protected void publishResults(CharSequence constraint, FilterResults results) {             filteredItems = (List<T>) results.values;             if (results.count > 0) {                 notifyDataSetChanged();             } else {                 notifyDataSetInvalidated();             }         }     } }